Influence of the degree of saturation on carbon steel corrosion in soil

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作者：
Hirata, Ryo [1 ,2 ]
Ooi, Azusa [1 ]
Tada, Eiji [1 ]
Nishikata, Atsushi [1 ]
机构：
[1] Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo,152-8552, Japan
[2] Now in Steel Research Laboratories, Nippon Steel Corporation, 1-8 Fuso-Cho, Amagasaki,Hyogo,660-0891, Japan
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Corrosion Science | 2021年 / 189卷
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摘要：
The corrosion behaviour of carbon steel was investigated in artificial soils of various saturations with 3% NaCl solution. The carbon steel corroded uniformly at slower rates in saturated soil and non-uniformly at higher rates in unsaturated soils. The corrosion current density (icorr) was measured by electrochemical impedance spectroscopy, and the percentage of corroded surface area (Aanode) was evaluated using a laser displacement metre. The corrosion current density (icorr(a)) of the corroded surface area was determined by dividing the icorr by (Aanode/100). Based on the results obtained, the influence of the degree of water saturation on carbon steel corrosion is discussed. © 2021
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